Synthesis of Novel 3d-Mofs with Pcu Topology Based on Photoinduced Electron Transfer (Pet): Fluorescence Sensing of Highly Toxic、Explosive Substances and Photocatalytic Degradation Activity

Abstract

In this work, we report the synthesis, spectral and crystallographic characterization of a novel Zn(II) group organic skeleton composed of 5-(1H tetrazol-5-yl) isophthalic acid (H3TIA) ligand (formula [Zn2(TIA)(H2O)3]n⋅nNO3(1)). Single crystal X-ray analysis shows that MOF-1 forms an infinite three-dimensional network structure and a double interpenetrating pcu topology through two symmetrical metal centers and a tetrazolium of TIA3- ligand. MOF-1 can be used as an efficient multifunctional fluorescent material for the high sensitivity detection of metal cations Pb2+, Hg2+ and NB. Research shows that the lowest detection limit can reach 10-7 M-1. In addition, MOF-1 was used as a light-driven catalyst for the photodegradation of TC antibiotics, with a photodegradation rate of 90.16% within 140 min. The possible sensing and photocatalytic mechanism of MOF-1 is explained through the comprehensive analysis of experiment and molecular orbital theory.

Keywords: Metal-Organic Frameworks, Luminescence sensing, Visible light, Photocatalysis activity